In addition to renewing Parks and Rec, NBC also officially picked up Heroes for a fourth (albeit likely shortened) season. Previously announced returns include The Office, 30 Rock, Law & Order: SVU, Friday Night Lights, The Biggest Loser and Celebrity Apprentice.

Conspicuously missing from NBC's press release is Medium, despite one trade mag's weekend report that it would be back for a sixth season. NBC sources tell TVGuide.com that in fact a decision on Medium has not yet been finalized, but that the network may announce additional pickups on May 19.

• Mercy, a medical drama told through the eyes of three nurses (played by Michelle Trachtenberg, Jamie Lee Kirchner and Taylor Schilling). The cast also include James Tupper, Diego Klattenhoff (Supernatural) and Guillermo Diaz (Weeds).

• Day One, an "event series" slated to air after the 2010 Winter Olympics wrap, and concerning life on earth in the wake of a global catastrophe. The cast includes Adam Campbell, Carly Pope (Popular) and Catherine Dent (The Shield).